Tsatsadu Generating Station (TGS)

Year of commissioning: 2019

Owner: Bui Power Authority

Type: run-of-river scheme

Information:

The Bui Power Authority completed Ghana’s first micro-hydropower plant to be known as the Tsatsadu Generating Station (TGS) under the Ministry of Energy’s renewable energy initiative. The Plant, situated on the Tsatsadu Waterfalls in the Hohoe District of the Volta Region, has a capacity of 45kW with the possibility of adding another 45kW capacity turbine in the future. The TGS is in response to the Ministry of Energy’s Renewable Energy Master Plan towards achieving Sustainable Development Goals which aims at ensuring access to affordable, reliable and modern energy for all by 2030.

The TGS, which is a run-of-river scheme, will not require the formation of a reservoir. It consists of a concrete diversion weir, an intake structure, diversion channel, a forebay, steel penstock, a powerhouse and a transmission line to tie the electricity generated into the national distribution grid. The weir diverts part of the river flow through an intake channel into the diversion channel. The diverted water goes through a 300mm diameter penstock to the base of the hill where the powerhouse, which houses the turbines and the generator, is located. The water drives the turbines and flows out through the tailrace channel and into the downstream of the waterfall.

Generation from the plant was estimated for seven months in a year after, with the rest of the months used for maintenance works.

The power plants will also serve as a learning center for students to gain more knowledge on the generation of mini hydro power in the subregion.

Project Background:

The Ministry of Energy in 2005 entered into a Memorandum of Understanding with the United Nations Industrial Development Organization (UNIDO) and International Network on Small Hydro Power of China (IN-SHP) to undertake studies to develop the existing small hydro power potentials in the country. The Tsatsadu Waterfalls, located at Alavanyo Abehenease in the Hohoe District of the Volta Region, was selected to be developed as a pilot project. UNIDO subsequently donated a 30kW Turgo Turbine and associated electromechanical equipment for the project. The Ministry of Energy appointed the Bui Power Authority in 2016 to develop the Tsatsadu Micro Hydropower Project on its behalf. BPA then reviewed all available information on the project. This included site assessment surveys, detailed topographical surveys and the development of engineering drawings for the project.

The electromechanical equipment donated by UNIDO were retrieved from the Volta River Authority (VRA) and serviced. The project, which was initially designed as a 30kW stand-alone system was upgraded to a 45kW grid-connection system. A new 45 capacity A-synchronous generator and new load controller were therefore procured to replace the existing 30kW generator and load controller.

The Ministry of Energy directed the BPA to constitute a technical committee to implement the project. The committee comprised representatives of the Renewable and Alternate Energy Directorate of the Ministry of Energy; the Energy Commission; the United Nations Development Program – Renewable Energy Technology Transfer (UNDP-RETT) Project Implementation Unit and the Electricity Company of Ghana (ECG).

Other stakeholders involved:

The Alavanyo Traditional Council, the Foyer de Charité (a Roman Catholic spiritual retreat centre) and the Alavanyo Abehenease Community.

Funding:

The entire project required an investment of $400,000. Most of the funding was provided by the BPA, which also received $80,000 from the RETT (Renewable Energy Technology Transfer) project initiated by the United Nations Development Programme (UNDP). The project has also received support from the Danish government.

Environmental Impact:

According to the BPA, the hydroelectric power plant located on Tsatsadu Falls has no impact on the environment since it does not use a water reservoir. In addition, the public agency decided to plant trees on the project site to restore vegetation to protect the banks of the river against siltation, sedimentation, erosion, nitrogen and phosphate loads.

More info: Bui Power Authority